EP 0831576 A1 19980325 - Soft switching power converter including means for connecting middle point voltage of a capacitive divider
Title (en)
Soft switching power converter including means for connecting middle point voltage of a capacitive divider
Title (de)
Sanftschaltender Stromwandler mit Mitteln zum Korrigieren der Mittelspannung eines kapazitiven Spannungsteilers
Title (fr)
Convertisseur de puissance à commutation douce comprenant des moyens de correction de la tension mediane d'un diviseur de tension capacitif
Publication
Application
Priority
FR 9611595 A 19960924
Abstract (en)
The power converter has: - two principal switches (S1,S2) which respectively connect an output (S) to a load (L) via a positive rail (VR+) or a negative rail (VR-) ; - two freewheel diodes (D1,D2) which maintain the current in the load (L) by respectively connecting the output (S) to the positive rail (VR+) or to the negative rail (VR-) ; - two capacitors (C1,C2) between the output (S) and the positive and negative rails (VR+,VR-) ; - an auxiliary circuit (CA) which includes an auxiliary inductance (LA) in series with two opposed unidirectional conducting auxiliary switches (T1,T2) connected between the output (S) and the mid point (M) of a capacitive voltage divider (DC). The divider itself includes two capacitors (CV1,CV2) connected in series between the positive and negative rails (VR+,VR-). At the midpoint of the divider a median voltage, with respect to the positive and negative rails (VR+,VR-), is output. The converter also includes: - device (CP,P1,AN) to evaluate the difference between the dividers median voltage and that of its nominal value; - as well as device (CCD,AD) to additionally control one or the other of the principal switches (S1,S2), according to the sense of the voltage difference during a period dependant on the amplitude of the difference, so as to cause an additional current in the auxiliary circuit (CA) to correct in part at least the difference.
Abstract (fr)
Convertisseur de puissance comprenant deux commutateurs principaux (S1 et S2) connectant une sortie (S), soit au rail positif (VR+), soit au rail négatif (VR-), deux diodes de roue libre (D1 et D2) permettant le maintien du courant dans la charge (L), deux condensateurs de basculement (C1 et C2) et un circuit auxiliaire (CA) comprenant notamment une inductance auxiliaire (LA) en série avec deux commutateurs auxiliaires (T1 et T2), couplé entre la sortie (S) et un point milieu (M) d'un diviseur de tension capacitif (DC) fournissant une tension médiane. Des moyens évaluent tout écart de ladite tension médiane par rapport à sa valeur nominale, tandis que les commutateurs principaux sont additionnellement commandés selon le sens dudit écart, pendant une durée dépendant de l'amplitude dudit écart, afin de causer un courant additionnel dans ledit circuit auxiliaire (CA) de nature à corriger en partie au moins ledit écart. <IMAGE>
IPC 1-7
IPC 8 full level
H02M 3/155 (2006.01); H02M 7/538 (2007.01); H02M 7/5387 (2007.01)
CPC (source: EP KR US)
H02M 1/08 (2013.01 - KR); H02M 7/4811 (2021.05 - EP); H02M 7/538 (2013.01 - EP US); H02M 7/5387 (2013.01 - EP US); H02M 7/4811 (2021.05 - US)
Citation (search report)
- [DA] WO 9205625 A1 19920402 - GEN ELECTRIC [US]
- [A] DONCKER R W DE ET AL: "THE AUXILIARY QUASI-RESONANT DC LINK INVERTER", PROCEEDINGS OF THE ANNUAL POWER ELECTRONICS SPECIALISTS CONFERENCE, MASSACHUSETTS, 25 - 27 JUNE, 1991, no. CONF. 22, 23 June 1991 (1991-06-23), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 248 - 253, XP000293058
- [DA] MCMURRAY W: "RESONANT SNUBBERS WITH AUXILIARY SWITCHES", IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, vol. 29, no. 2, 1 March 1993 (1993-03-01), pages 355 - 361, XP000369395
Designated contracting state (EPC)
BE CH DE FR GB IT LI SE
DOCDB simple family (publication)
EP 0831576 A1 19980325; CA 2215181 A1 19980324; FR 2753850 A1 19980327; FR 2753850 B1 19981113; JP H10108456 A 19980424; KR 19980024855 A 19980706; US 5880949 A 19990309
DOCDB simple family (application)
EP 97402015 A 19970828; CA 2215181 A 19970923; FR 9611595 A 19960924; JP 25903797 A 19970924; KR 19970048155 A 19970923; US 93619897 A 19970923